Old 01-13-2019, 11:55 AM   #1
Fabian
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Default Strange automation knee...

When I insert two automation points for a JSFX parameter, set the first one at -12 dB to "fast end" and then raise the second one to 6 dB, what looks like a hard knee appears at the point where the value would correspond to 0 dB.



Surely this is not as it should be?
I expected a smooth transition from -12 dB to 6 dB, not this jerk at 0 dB.
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Old 01-13-2019, 11:58 AM   #2
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If I do the same thing with track volume automation, I get the smooth curve that I expect (on top of the gif below).



but not so for automating the JSFX slider.

So... is this as it should be?
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Old 01-14-2019, 07:40 AM   #3
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can't reproduce this...what JSFX are you using ?
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Old 01-14-2019, 11:58 AM   #4
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Quote:
Originally Posted by bezusheist View Post
can't reproduce this...what JSFX are you using ?
JS Tone Generator.
And I'm automating the Wet Mix slider.

I tried just now also the JS White Noise Generator, and if I change the max value of the Noise Volume to 6 dB and recompile (Ctrl+S), then I get the same hard knee at 0 dB (after reloading it).

All of the point shapes, except Square, give such a hard knee at 0 dB.

This now looks like a bug to me.
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Last edited by Fabian; 01-14-2019 at 12:06 PM.
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Old 01-14-2019, 12:11 PM   #5
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Top is automation of JS Tone Generator, Wet Mix parameter, with shape of the second envelope point set to Fast end.

Below it is automation of JS White Noise Generator, Noise Volume parameter, with the second envelope point set to Slow Start/End.
And this is with the Noise Volume edited to allow to go to 6 dB.
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Old 01-14-2019, 12:41 PM   #6
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ok...i can duplicate that now...i was testing with my own JSFX before, which have symmetrical gain, and it did not happen.
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Old 01-14-2019, 12:54 PM   #7
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Quote:
Originally Posted by bezusheist View Post
ok...i can duplicate that now...i was testing with my own JSFX before, which have symmetrical gain, and it did not happen.
So you think this is a bug...?
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Old 01-15-2019, 12:03 PM   #8
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ello-1 has a center line,and the other does not-is that a zero line?
tried volume scaling options?
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Old 01-15-2019, 12:23 PM   #9
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would say it's a bug,because mouse over values change- + never liked this behaviour sinced introduced tbh, fwiw..
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Old 01-15-2019, 12:48 PM   #10
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I reported it here https://forum.cockos.com/showthread....31#post2082831. We'll see what happens.
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